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Colloid‐Facilitated Metal Transport in Peat Filters
Water Environment Research, 2010The effect of colloids on metal retention in peat columns was studied, with the focus on colloids from two sources—organic matter leached from peat, and introduced organic and hydrous ferric oxide (HFO) colloids. A significant fraction of metals was found to be associated with peat‐produced organic colloids; however the concentrations of organic ...
Kalmykova, Y. +5 more
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Colloid-facilitated contaminant transport in fractal media
Physical Review E, 2011We investigate colloid-facilitated contaminant advection in strongly heterogeneous geological medium with fractal properties. Transport regimes and asymptotic behavior at large distances are studied for different relationships between sorption parameters and characteristics of percolation medium. Crossover times between transport regimes are determined.
Leonid A, Bolshov +2 more
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Colloid-Facilitated Plutonium Transport in Fractured Tuffaceous Rock
Environmental Science & Technology, 2017Colloids have the potential to enhance the mobility of strongly sorbing radionuclide contaminants in groundwater at underground nuclear test sites. This study presents an experimental and numerical investigation of colloid-facilitated plutonium transport in fractured porous media to identify plutonium reactive transport processes.
Andrew Wolfsberg +5 more
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Colloid-facilitated transport of hydrolytic enzymes in soils
2022<p>Colloids are known to facilitate transport of a broad variety of chemicals and microorganisms in soils. Extracellular hydrolytic enzymes, produced by many soil microorganisms and plant roots, have high affinity to clay and silt particles constituting soil mineral colloids (SMC).
Andrey Guber, Alexandra Kravchenko
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Colloid-facilitated transport of lead in natural discrete fractures
Environmental Pollution, 2009Colloid-facilitated transport of lead (Pb) was explored in a natural chalk fracture with an average equivalent hydraulic aperture of 139 microm. Tracer solution was prepared by adding montmorillonite (100 mg L(-1)) and/or humic acid (HA) (10 mg L(-1)) to modified artificial rainwater containing dissolved Pb (21.4 mg Pb L(-1)), naturally precipitated ...
Xiang-Yu, Tang, Noam, Weisbrod
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Colloid-facilitated transport of radionuclides through fractured media
Journal of Contaminant Hydrology, 1993Abstract The sorption of radionuclides on natural colloids may significantly modify their transport behaviour through fractured media, since radionuclides bound to colloids may not be subject to the important retardation mechanisms of matrix diffusion and sorption onto pore surfaces.
P.A. Smith, C. Degueldre
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Colloid-facilitated radionuclide transport in fractured porous rock
Waste Management, 1996Numerical methods have been applied for the prediction of colloid-facilitated radionuclide transport through water-saturated fractured porous rock. The presence of colloids may enhance the transport of radionuclides in groundwater by reducing retardation effects. The colloids existing in the groundwater act as carriers, adsorbing radionuclides in their
I. Baek, W.W. Pitt
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Colloid-Facilitated Transport of Cesium in Variably Saturated Hanford Sediments
Environmental Science & Technology, 2005Radioactive 137Cs has leaked from underground waste tanks into the vadose zone at the Hanford Reservation in south-central Washington State. There is concern that 137Cs, currently located in the vadose zone, can reach the groundwater. In this study, we investigated whether, and to what extent, colloidal particles can facilitate the transport of 137Cs ...
Gang, Chen +3 more
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Colloid and Colloid-Facilitated Transport in Fractured Chalk
2020Colloid and colloid-facilitated transport of contaminants with high affinity to the solid matrix is likely to occur in fractured rocks.
Emily Tran, Noam Weisbrod
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Colloid-facilitated Transport of Heavy Metals in Lake Sediments
2022<p>This work focuses on the development of a mechanistic Fe(hydr)oxide based (HFO) colloid-facilitated reactive transport model which identifies the impact of HFO colloids on the stability and mobility of heavy metals (Zn and Pb) in example subsurface benthic sediments of Lake Coeur d&#8217;Alene (LCdA), USA. Ferrihydrite colloids
Sema Sevinç Şengör, Kahraman Ünlü
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